Caster vibration-proof structure of a suitcase

ABSTRACT

The present invention of a an improved caster vibration-proof structure of a suitcase having an elastic vibration-proof structure to reduce impact, is disposed at a suitable place near where a caster of a suitcase is located, the caster is pivoted inside a placing part of a caster base, a caster cover is used to fix its position, a pair of corresponding positioning pivot parts are disposed inside the placing part, the positioning pivot parts are for caster shafts disposed at both sides of the caster to pivot on, each positioning pivot part having an enclosed placing hole at a suitable location, for mounting an elastic element, the elastic element having a positioning section at its one end for the caster shaft to insert into, so that elasticity of each elastic element can take effect on the caster shaft, to make the caster to have elastic vibration-proof function, thus a simply of a caster vibration-proof structure is achieved, at the same time can also improve its stability.

BACKGROUND OF THE INVENTION

Referring to FIG. 1, conventional suitcase uses an axial pin to connect a caster base and a caster together. It causes vibration because of the absence of vibration-proof structure.

SUMMARY OF THE INVENTION

The present invention of an improved caster vibration-proof structure of a suitcase provides a more stable function of a vibration-proof caster structure and at the same time can enhance the efficiency of its structural assembly

The present invention will become more fully understood by reference to the following detailed description thereof when read in conjunction with the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective exploded view of a first prior art;

FIG. 2 is a perspective exploded view of the present invention;

FIG. 3 is a sectional assembly view of the present invention;

FIG. 4 is a sectional assembly view of the present invention showing its vibration-proof feature;

FIG. 5 is a perspective exploded view of a second embodiment of the present invention;

FIG. 6 is a sectional assembly view of the second embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 2 to 4, the present invention of an improved caster vibration-proof structure of a suitcase mainly comprises a body 10, a caster base 20, a caster 30 pivotally disposed on the caster case 20, and a caster cover 40 fro covering the caster 30.

The caster case 20 is in L-shape and a placing part 21 is disposed at its angle. A pair of corresponding positioning pivot parts 22 are disposed inside the placing part for the caster 30 to pivot on. Each positioning pivot part 22 having an enclosed placing hole 23 at a suitable location and a positioning spring groove 231 for placing and positioning an elastic element 50.

The caster 30 is in conventional structure and having a shaft 31 disposed on the center of the caster 30, an outer bushing 32 made of flexible material is disposed on the outside of the shaft 31.

The cover 40 having a hollow part 41 in corresponding to the sectional structure of the placing part 21, a concave covering part 42 is disposed on both ends of the hollow part 41 for covering the shaft 31, so that the cover 40 can position the caster 30.

The elastic element 50 is a conventional spring structure, and having a circular positioning section 51 in corresponding to one end of the shaft 31 for sleeving on the shaft 31.

Accordingly, the present invention provides a simplified structure of elastic and vibration-proof caster 30 for the body 10.

Please refer to FIGS. 5 and 6, the second embodiment of the present invention. When the caster 30 is mounted on the caster base 20, the two ends of the placing part 21 for pivotally disposing the shaft 31 of the caster 30 are positioning groove 24 in long groove shape. The cover 40 having positioning pivot parts 43 for covering and positioning the shaft 31. An enclosed placing hole 44 and a positioning spring groove 441 are disposed on the positioning pivot part 43 for the elastic element 50 to place on. The elastic element 50 having the positioning section 51 at one end for sleeving the shaft 31 to ensure stable vibration-proof structure.

The present invention having a simple structure and ease of assembly. The main elements for achieving the vibration-proof function include the placing holes 23 or 34 for placing the elastic element 50, without other complicated structural elements. When assembling, simple sleeve the positioning section 51 disposed on one end of the elastic element 50 on the shaft 31 of the caster 30, so that the elastic element 50 is placed inside the placing holes 23 or 44, then use the cover 40 to position it. The production cost is reduced and production efficiency can be enhanced because of its simple structure.

The present can also provide a stable vibration-proof function. After the positioning section 50 of the elastic element 51 sleeved on the shaft 31, the elasticity of the elastic element 50 can apply on the shaft 31 instantly when a vibration occurs, so that its vibration-proof function is enhanced. Besides, the inner hole of the outer bushing 32 is tightly sleeved on the shaft 31, the outer edge of the outer bushing 32 are also tightly in contact with the positioning pivot parts 22 and 43. Therefore, the caster 30 is firmly and stably pivoted, and to avoid dimensional inaccuracy of the pivotal assembly of the shaft 31 and the positioning pivot parts 22 and 43, and loose structure due to wearing between the elements.

Note that the specification relating to the above embodiment should be construed as exemplary rather than as limitative of the present invention, with many variations and modifications being readily attainable by a person of average skill in the art without departing from the spirit or scope thereof as defined by the appended claims and their legal equivalents. 

1. An improved caster vibration-proof structure of a suitcase mainly comprises a caster base mounted on a suitcase body on a suitable place, said caster base having a placing part for a caster to pivotally dispose on it, said placing part having a pair of corresponding positioning pivot parts for a shaft that stuck out from two sides of said caster to pivotally place on, each said positioning pivot part having an enclosed placing hole disposed at a suitable place for placing an elastic element; two elastic elements disposed inside said placing holes respectively, each said elastic element having a positioning section disposed at its one end for said shaft to insert into; a cover fixedly disposed on the outside of said placing parts of said caster base for covering and positioning said caster, accordingly, the present invention provides a simple caster vibration-proof structure, the elasticity of two said elastic elements can instantly apply on said shaft to enhance its vibration-proof stability.
 2. An improved caster vibration-proof structure of a suitcase as claimed in claim 1, said shaft of said caster having an outer bushing disposed outside, an inner hole of said outer bushing having tight sleeve contact with said shaft, and outer edge of said outer bushing also having tight contact with said positioning pivot parts, so as to avoid wearing caused by rubbing between said shaft and said positioning pivot parts, or loose structure because of dimensional inaccuracy.
 3. An improved caster vibration-proof structure of a suitcase having a caster base mounted on a suitcase body on a suitable place, said caster base having a placing part, said placing part of said caster base having a positioning groove disposed at its both ends for two sides of said shaft of said caster to pivotally dispose on; a caster cover fixedly disposed on the outer edge of said placing part of said caster base, said caster cover having two positioning pivot parts disposed inside for covering and positioning said shaft, each said positioning pivot part having an enclosed placing hole disposed on a suitable place for placing an elastic element; one side of each said elastic element inside said placing hole having a positioning section for said shaft to insert into, accordingly, the present invention provides a simple caster vibration-proof structure, and the elasticity of two said elastic elements can instantly apply on said shaft to enhance the stability of the vibration-proof function.
 4. An improved caster vibration-proof structure of a suitcase as claimed in claim 3, said shaft of said caster having an outer bushing disposed outside, an inner hole of said outer bushing having tight sleeve contact with said shaft, and outer edge of said outer bushing also having tight contact with said positioning pivot parts, so as to avoid wearing caused by rubbing between said shaft and said positioning pivot parts, or loose structure because of dimensional inaccuracy. 